A Singapore man undergoing treatment for cancer was detained for four hours by U.S. immigration officials after the drug he was taking caused his fingerprints to disappear.

Foreign visitors undergo mandatory fingerprint screening when they enter the United States.

Now, the unidentified man's oncologist is asking patients taking the commonly used drug, capecitabine, to carry a doctor's note when they travel to the United States.

The oncologist, Eng-Huat Tan of the National Cancer Center in Singapore, described the encounter in a letter published in the current issue of the cancer journal Annals of Oncology.

The 62-year-old cancer patient, identified as Mr. S, eventually was allowed to enter the United States and visit relatives after officials determined he did not pose a security threat.

According to the oncologist, the patient had neck and head cancer that had spread. He responded well to chemotherapy.

To prevent a recurrence, doctors placed him on capecitabine, marketed in the United States as Xeloda.

Google spent Wednesday morning trying to get developers excited about the next generation of Web technologies by showing off how future Web applications will mimic desktop apps.

"It's time for us to take advantage of [this]. . .amazing opportunity," Google's Eric Schmidt told developers.

"It's time for us to take advantage of the amazing opportunity that is before us," said Google CEO Eric Schmidt, kicking off Google I/O 2009 in San Francisco. Schmidt was referring to the growing sense that the Internet and browsers--rather than a computer's operating system--will be the future foundation for application development.

The industry isn't quite ready for that yet. Many of applications demonstrated before the crowd of around 4,000 developers will require the widespread adoption of HTML 5 technologies, which are still under development by a consortium of companies and organizations.

Still, Google's Vic Gundotra, vice president of engineering, noted that the four modern open standards browsers (Firefox, Safari, Chrome,and Opera) are all adopting some HTML 5 technologies as they become more stable, taking every opportunity possible to ding Microsoft's Internet Explorer for lagging behind the other four browsers.

However, offstage after his keynote, Gundotra downplayed any conflict with Microsoft, noting that its task in moving toward HTML 5 is more complex because of the large number of enterprises running Internet Explorer, and the possibility that internal applications developed for that browser could break. "As they follow through, they are going to have a huge impact on moving the Web forward," he said.

Gundotra showed off how Web applications will be able to take advantage of five main HTML 5 concepts: canvas tags, video tags, geolocation, application caching and database, and Web Workers.

A crude bomb made from a water bottle was used in an explosion that damaged a Starbucks coffee shop on New York's posh Upper East Side, New York police said.

Monday's explosion shattered glass at the Manhattan Starbucks coffee shop. No one was injured.

The Memorial Day explosion damaged the shop, but no one was injured and no motive has been identified for the bombing.

"We believe it to be ... a six- to 10-ounce water bottle that was wrapped in black tape," New York Police Commissioner Ray Kelly told CNN on Wednesday.

He said the bomb's powder may have come from fireworks components, including a fuse. The powder was placed inside the bottle in a way that made it "more powerful," Kelly said.

He said a forensics unit is working on finding fingerprints.

The homemade bomb, which went off around 3:30 a.m., shattered glass, but no one was injured. The store was not open. Police have said the device was planted under a wooden bench outside the coffee shop.

"We have a witness who believes he saw two young people he describes as teenagers, both white males," the commissioner said. One is described as blond, wearing a red shirt, and the other had brown hair and wore a gray shirt.

Kelly said the witness saw the two approach the Starbucks, then looked away. After the witness heard the blast, he said he saw the two young people run away from the building.

Kelly said that for now, it's impossible to say whether the bombing was politically motivated.

"We don't know if they were a corporate target or somebody had a problem [with] what was going on on that corner, in general ... we're not ruling anything out."

In 1999, a Starbucks in Seattle, Washington, was vandalized during a world trade conference. In February 2008, a Vancouver Starbucks and another restaurant were damaged by an overnight explosion.

Meet Kaden, bomb-sniffing dog in training.

His name, a Gaelic word meaning "little battle," is fitting for the energetic 12-pound puppy with a perky tail that curls like a cinnamon bun.

At 4 months old, Kaden is a playful, black- and white-coated basenji being schooled at Georgia K9 National Training Center. Once fully trained, he will assist federal and local police officers as well as private corporations in nosing out deadly explosives at schools, airports and public events.

His detective skills can potentially save thousands of lives in an era where law enforcement agencies are aggressively fighting against drugs and terrorist attacks.

"Think about a scenario like the 1996 Olympic bombings," says Kaden's trainer Jeff Schettler, a cheery man who has coached hundreds of dogs to sniff out bombs, drugs, missing people and corpses since the mid-1990s.

Police dogs remain the most affordable and reliable solution to solving crimes that require scent detection, police officers say. Trained dogs can track down cocaine camouflaged inside car seats. They can find children who have mysteriously vanished overnight. Detection dogs can even weed out pest-infested apples and oranges accidentally left in suitcases at airports.

"They are a growing aspect of law enforcement," says Jim Watson, secretary at the North American Police Work Dog Association and a handler for decades.

Earlier this month, investigators were baffled during the international manhunt for George Zinkhan, a former University of Georgia professor accused of fatally shooting his wife and two other people.

Two weeks into the search, two cadaver dogs, a German shepherd named Circe and an Australian shepherd named Madison, arrived. Within 10 hours, the dogs picked up the scent of Zinkhan's remains in a shallow pit hidden in a thick forest. Once the dogs neared the suspect's body, they gave their handlers personalized signals. Circe barked excitedly. Madison lay down.

Trainer Jeff Schettler explains Kaden is an unlikely candidate for police work. Basenjis, a breed that originated in central Africa, are usually used as hunting or show dogs. There are only two other trained police dog basenjis recorded by the North American Police Work Dog Association.

Most trainers in the police dog world dislike experimenting with new dogs, preferring to stick to breeds with a proven track record. Most law enforcement agencies rely on Belgian Malinoises and German shepherds for detection work because of their protective yet friendly personalities, but labs, bloodhounds and beagles also can be used.

"We're not trying to fix anything," Schettler says. "We're trying to enhance it."

Schettler points out some of Kaden's advantages: The dog's weight will peak at about 25 pounds, enabling him seamlessly to sift between cramped luggage and lockers. Kaden is barkless because basenjis have an oddly shaped larynx, ideal for quiet searches.

On a recent rainy Saturday morning at the Georgia K9 National Training Center, little Kaden undergoes testing. Passing the exam depends on his whiffing talents.

Upon the instructor's command, Kaden's pencil-thin legs playfully trot along the damp grass to an oversize wall scattered with dozens of holes. His instructor has hidden black gunpowder wrapped in pantyhose in one of the holes.

If Kaden's nose sniffs out the gunpowder, he will immediately sit.

Kaden begins on the left side, quickly taking a zigzag pattern from one hole to another. His pace is methodical, a sniff for each hole. Soon he slows, pauses, inhales again and then sinks his tiny hindquarters to the ground.

"What a good boy," coo several of Kaden's trainers, stroking his sleek fur and rewarding him with one of his favorite treats, torn bits of venison jerky.

As Kaden nibbles on his treat, Schettler admits there are drawbacks to training basenjis. Basenjis don't have a furry coat to endure cold weather like a German shepherd.

Basenjis are also a highly independent, stubborn breed with personalities similar to cats, making them difficult to train. Kaden's personality, however, is contrary to most basenjis. He was culled from a litter in Atlanta at 7 days old because of his unusual sociability with humans.

"At eight weeks, he was in the airport going up to people and running around like he owned the place," Schettler says.

Training detection dogs such as Kaden often begins during puppyhood so imprinting scent differentiation becomes innate, handlers say. Puppies are selected based on breed purity, confidence, sociability and temperament.

In any training program, there are doggie dropouts. In those instances, the puppies become pets.